EP1511088A4 - Light emitting element drive device and mobile device using the same - Google Patents

Light emitting element drive device and mobile device using the same

Info

Publication number
EP1511088A4
EP1511088A4 EP03730692A EP03730692A EP1511088A4 EP 1511088 A4 EP1511088 A4 EP 1511088A4 EP 03730692 A EP03730692 A EP 03730692A EP 03730692 A EP03730692 A EP 03730692A EP 1511088 A4 EP1511088 A4 EP 1511088A4
Authority
EP
European Patent Office
Prior art keywords
led
drive
light emission
emitting element
light emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03730692A
Other languages
German (de)
French (fr)
Other versions
EP1511088A1 (en
EP1511088B1 (en
Inventor
Kazuhito Tsuchida
Junji Saito
Kazuo Sudo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Sony Mobile Communications Inc
Original Assignee
Sony Corp
Sony Mobile Communications Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2002160536A priority Critical patent/JP3745310B2/en
Priority to JP2002160536 priority
Application filed by Sony Corp, Sony Mobile Communications Inc filed Critical Sony Corp
Priority to PCT/JP2003/006735 priority patent/WO2003103061A1/en
Publication of EP1511088A1 publication Critical patent/EP1511088A1/en
Publication of EP1511088A4 publication Critical patent/EP1511088A4/en
Application granted granted Critical
Publication of EP1511088B1 publication Critical patent/EP1511088B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials
    • H05B33/0806Structural details of the circuit
    • H05B33/0809Structural details of the circuit in the conversion stage
    • H05B33/0815Structural details of the circuit in the conversion stage with a controlled switching regulator
    • H05B45/10
    • H05B45/20
    • H05B45/37
    • H05B45/40
    • H05B45/46
    • H05B47/16
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y02B20/34Inorganic LEDs
    • Y02B20/341Specially adapted circuits
    • Y02B20/346Switching regulators
    • Y02B20/347Switching regulators configured as a current source

Abstract

A light emitting element drive device capable of always outputting the lowest voltage satisfying the drive condition and having a high light emission efficiency and a low power loss. A mobile device using it is also disclosed. LED’s (20-1 to 20-n) requiring different voltage for light emission are connected in parallel and there is provided one or more LED drive devices (10) for driving the LED’s. The LED drive devices (10) include drive circuits (13-1 to 13-n) connected to the corresponding LED’s so as to current-drive the corresponding LED’s with the luminance based on the set value and power supply circuits (14, 15) for judging the drive voltage value required for the highest light emission among one ore more LED’s driven for light emission and supplying the drive voltage of at least judged value to a plurality of LED’s in parallel.
EP03730692A 2002-05-31 2003-05-29 Light emitting element drive device and mobile device using the same Active EP1511088B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002160536A JP3745310B2 (en) 2002-05-31 2002-05-31 Light emitting device drive device and portable device using the same
JP2002160536 2002-05-31
PCT/JP2003/006735 WO2003103061A1 (en) 2002-05-31 2003-05-29 Light emitting element drive device and mobile device using the same

Publications (3)

Publication Number Publication Date
EP1511088A1 EP1511088A1 (en) 2005-03-02
EP1511088A4 true EP1511088A4 (en) 2005-12-14
EP1511088B1 EP1511088B1 (en) 2009-11-04

Family

ID=29706550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03730692A Active EP1511088B1 (en) 2002-05-31 2003-05-29 Light emitting element drive device and mobile device using the same

Country Status (7)

Country Link
US (7) US7365718B2 (en)
EP (1) EP1511088B1 (en)
JP (1) JP3745310B2 (en)
KR (1) KR100945205B1 (en)
CN (1) CN100570686C (en)
DE (1) DE60329914D1 (en)
WO (1) WO2003103061A1 (en)

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Also Published As

Publication number Publication date
US8941581B2 (en) 2015-01-27
JP2004006533A (en) 2004-01-08
EP1511088A1 (en) 2005-03-02
KR20050023263A (en) 2005-03-09
CN1656621A (en) 2005-08-17
US8654059B2 (en) 2014-02-18
KR100945205B1 (en) 2010-03-03
US20140339997A1 (en) 2014-11-20
US8618745B2 (en) 2013-12-31
US20130033196A1 (en) 2013-02-07
US7365718B2 (en) 2008-04-29
US9041643B2 (en) 2015-05-26
US20140225522A1 (en) 2014-08-14
US9148927B2 (en) 2015-09-29
DE60329914D1 (en) 2009-12-17
CN100570686C (en) 2009-12-16
EP1511088B1 (en) 2009-11-04
JP3745310B2 (en) 2006-02-15
US20050225515A1 (en) 2005-10-13
US20140078030A1 (en) 2014-03-20
US20150359058A1 (en) 2015-12-10
WO2003103061A1 (en) 2003-12-11
US20080204381A1 (en) 2008-08-28
US9717124B2 (en) 2017-07-25

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